| CVD炭/炭刹车材料制备工艺和微观结构研究 |
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| 引用本文： | 谢志勇,黄启忠,苏哲安,张福勤,黄伯云.CVD炭/炭刹车材料制备工艺和微观结构研究[J].非金属矿,2005,28(1):53-55. |
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| 作者姓名： | 谢志勇 黄启忠 苏哲安 张福勤 黄伯云 |
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| 作者单位： | 中南大学粉末冶金国家重点实验室,湖南,长沙,410083 |
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| 基金项目： | 国家工业性试验项目;中南大学校科研和教改项目 |
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| 摘 要： | 用炭毡作为纤维增强体 ,设计特殊的导电发热层 ,采用多元耦合物理场CVD工艺 ,在自行设计的CVD炉中增密用于刹车材料的C/C复合材料 ,并就CVD沉积条件和石墨化热处理温度对C/C复合材料微观结构的影响进行了研究。对沉积炭的组织结构进行了观察和分析 ;对C/C刹车材料的石墨化度 g和石墨微晶尺寸Lc进行了量化分析。研究表明 :较高的沉积温度和较低的压力 ,有利于材料的组织结构由光滑层 (SL)向粗糙层 (RL)结构转变 ,材料的可石墨化能力和微晶尺寸呈升高趋势 ;随石墨化热处理温度的升高 ,材料的石墨化度和微晶尺寸呈升高趋势 ,但粗糙层组织结构升高的幅度远大于光滑层。
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| 关 键 词： | CVD 炭/炭(C/C)刹车材料 工艺条件 微观结构 |
| 修稿时间： | 2004年8月3日 |
Study on Processes and Microstructures of Carbon/Carbon Composites for Brakes |
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| Xie Zhiyong,Huang Qizhong,Shu Zhean,Zhang Fuqin,Huang Boyun.Study on Processes and Microstructures of Carbon/Carbon Composites for Brakes[J].Non-metallic Mines,2005,28(1):53-55. |
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| Authors: | Xie Zhiyong Huang Qizhong Shu Zhean Zhang Fuqin Huang Boyun |
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| Abstract: | The carbon felt as porous performs,installing special electric layer in performs,C/C composites were fabricated by chemical vapor infiltration (CVI) by adding electromagnetic field.And the infiltration conditions have been optimized.The textural of pyrolytic carbons were observed by PLM,and the graphitization degree and microcrystal size of these C/C composites was analized by XRD.The results showed that a pure,high textured carbon matrix is formed in higher deposition temperature and lower pressure.Graphitization can improve graphitization degree,but rough laminar does more than smooth laminar and banded structure. |
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| Keywords: | chemical vapor deposition carbob-carbon brake composites technology condition microstructure |
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